Printing telegraph



April 21, 1931. Y. oKAMoTo PRINTING TELEGRAPH Filed Nov. l2, 1928 '7 Sheets-Sheet l I INVENTOR YI/lfjfl Ulm/V070 BY ww/Mfwuu ATToRNl-:YJv

April 21, 1931. Y. oKAMoT PRINTING TELEGRAPH Filed Nov. 12, 192s '7 sheets-sheet 2 .nm-mmm? uuuuuuuuul.

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lNvENToR YUJCH/ w114/voro April 21, 1931'. Y. @KAMoTo 1,801,528

PRINTING TELEGRAPH Filed Nov. 12, 1922s '7 sheets-sheet 4 INVENToR Yule/fl OKAMOTO ATTORNEY.)`

April 21, 1931. \Y. oKAMoTo PRINTING TELEGRAPH Filed Nv. 12. 1928 7 sheets-sheet 5 NvENToR YUJCHI OEA/V070 BY .M1-maw ATTORN EVS April 21, 1931. Y OKAMOTO 1,801,528

PRINTING TELEGRAPH Filed Nov. 12, laas 'r sheets-sheet A7 INVENTOR IU/cHf Umor@ ATTORNEYLS` Patented Apr. 21, 1931 YUICHI OKAMOTO, F EBARA-GUN, TOKYO, JAPAN PRINTING TELEGRAPH Application led November 12, 1928. Serial No. 318,729.

My invention relates to printing telegraphs in which the depression of key levers at the transmission end bearing all the characters used in the alphabet, cause by electrical and mechanical means the depression at the receiving end of type levers bearing the corresponding characters and thus the printing on receiving tape or paper of the conimunication transmitted by means of the transmitting key levers.

The primary object of my invention is to provide simple and effective means for this purpose.

To this end, my invention comprises means whereby the depression of each transmission key lever transmits a certain number of alternating positive and negative impulses, by which a corresponding combination of receiving type lever selector bars are positioned, to throw into coaction with type lever actuating mechanism the type lever corresponding to the key lever depressed, and a direct impulseis then transmitted to cause the operation of the selected type lever.

In the present preferred embodiment of my invention, the depression of each transmitting key lever releases and starts` the rotation of a motor-driven commutator having a number of brush contacts, corresponding 3o to the number of characters to be transmitted, alternately in circuit With a positive and a negative source of electricity, and With the receiving` mechanism. The commutator is caused by the key lever to rotate through a certain number-of contacts, of a number corresponding to the key lever depressed, so that a corresponding number of alternating positive and negative impulses is transmitted.

The selected number of alternating im- 0 pulses is caused through a receiving olarized relay to position a combination o notched type lever selector bars corresponding to the key lever depressed, and the entrance ofthe corresponding type lever pull bar into the i aligned notches of the selector bars causes the operation of the corresponding type I ever by the action ofthe final current on a direct current type-lever relay.

In order that my invention may be fully understood, I shall first describe in detail the mode in which I at present prefer to carry my invention into practice.

Reference is to be had to the accompanying drawings forming part of this application for patent, in Which like parts are designated by the same numbers in all the figures.

Figure 1 is a partly diagrammatic view of a printingI telegraph embodying my invention.

Figures 2 and 3 are enlarged detail side 60 views of the means for controlling the rotation .of the commutator by the key levers in two ditferent positions.

Figures 4, 5, and 6, are end views of the same in different positions. Figures 7,' 8, 9, and 10, are detail vieWs of the receiving type lever selecting and operating mechanism.

Figures 11 and 12, are detail sectional and sectional side views respectively of the slip clutch used on the transmitting and receiving driving shafts.

Figure 13 is a detail view of part of the type lever selecting mechanism.

Figure 14 is a detail view of part of the 75 type lever operating mechanism.

Figure 15 is a detail view of part of the type lever selecting mechanism.

Figure 1G is a detail view of the commutator enlarged to show its speciiic construction.

1n the specific embodiment ofmy invention shown in the drawings, 2() designates the type levers bearing the characters to be transmitted, of which there are supposed to be 62', S5 characters of the Japanese alphabet, in the present example. i

To transmit to the receiving mechanism a certain number of alternating' positive and negative impulses by the depression of each 9o type lever, I use in this example the following means:

A shaft 21 is revolved from a continuously operating motor 22 and its shaft 25, through a slip clutch 23 and gearing 24.

The slip clutch 28 here used is shown in detail in Figures 11 and 12, and comprises a shaft coupling 26 iiXed to one section of the shaft, and opposing springs 27 fixed in the coupling between which springs is held yieldingly but can turn the flattened, oblong, or otherwise unequally proportioned end 28 of the other shaft section.

On the shaft 21 is fixed a commutator brush 29 which is thereby rotated over a circle of positive and negative contacts 30 and 31 respectively, in number and arrangement correspondln to the 62 type levers 20, insulated in a fixe commutator disk 32, shown enlarged in Figure 16.

The positive contacts 30 extend radially inward from the outer rim of the disk 32, and are all thereby connected by wiring 33 with a positive electric source 34 (Figure 1). The negative contacts 31 extend radially outward from the center of the disk between alternate positive contacts, and are all con.- neeted by wiring 35 to a negative electric source 36.

A Contact spring 37 carries the alternately ositive and negative impulses thus collected y the revolving commutator brush 29 through a main wire 38 to the receiving mechanism hereinafter described.

On the commutator (brush) shaft 21 is fixed also a stop arm 39, which is initially held in position by a movable bar stop 40, withdrawable by a sprino 41. y The bar stop 40 is pivotally connected to a lever 42 swinging on a pivot 43, and to said lever 42 is connected by a pivot 44 a spring pressed follower lever 45 which engages and is shifted laterally by a spiral 46 on the drivin@ shaft The follower. lever 45 is engaged= by a cani lever 47 swinging on a pivot 48, and in turn en aged and swung by a bar 49, connected to a -shape lever 50 spanning all the key levers 20, so as to be swung upward when any key lever is depressed.

A setting lever 51 also engages and operates the U-lever 50. l Y

The arrangement is such that when the setting lever 51 is depressed, the U-lever 50, through the bar 49 and lever 47, disengages the follower lever 45 from the spiral 46, and thus permits the stop spring 41 to withdraw the bar stop 40 from the revoluble stop arm 39. The commutator shaft and commutator brush 29 are then revolved by the motor 22 about three revolut-ions, when the setting lever 51 being released, causes the follower 45 to reengage t e spiral 46, and the spiral to reen age the stop 40 with the stop arm 39, an stop the commutator. `When any key lever 20 is then depressed, the commutator is lin like manner released and revolved, transmitting a certain number of alternating 1mpulses, until the stop arm 39 is halted by one of a circle of selecting stops 52, 'projected from a selecting disk 53 by the particular` key lever 20 depressed, as hereinafterl described. When the follower lever 45 is again released from the spiral 46 by a key lever as described, it is swung to the left (in Figure 1) by the action of the bar stop spring 41, and reengages the spiral, but does not reengage the stop 40 with the revolving stop arm 39, as the con'nnutator, and thus the spiral turnsl only a part of a revolution, corresponding to the arc from the stop 4() to the selected stop 52 or from the last selected stop 52 to the next selected stop 52.

The selecting disk 53 is formed with a number 0i (in this example 62) vertical openings acting as stop guides 54, corresponding to the respective key levers. In the stop guides 54 are arranged to slide vertically, the corresponding selecting stops 52, each having a shoulder 55, to rest normally, on a corresponding shoulder inthe stop guide. l

The lower end of each selecting stop 52 is engaged by the correspondingl key lever 29, so that each key lever when depressed will project its respective selecting stop above the selecting disk into the path of the revolving stop arm 39.

On the selecting disk 53 is placed a separate corresponding stop retaining disk 56, to turn slightly on the selecting disk 53, and having openings 57 to register with the corresponding stop guides 54. I

The. retaining disk 56 has also a stop shoulder 58, to engage the shoulder 59 of a pivoted lever 60, which has a pin 61 engaged by the U-lever 50, a spring 62 connecting it with the retaining disk 56, and a spring 63 pressing the lever pin 61 against the U-lever 50.

The arrangement is such that when any key lever 20 is depressed, the lever 60 is first moved to turn, through a spring 62, the sto retaining disk slightly on the selecting dis 56, causing the openings in the retaining disk to register with the respective stop guides in the selecting disk.

The key lever then projects its corresponding stop 52 above the retaining disk to stop the rotation of the commutator stop arm 39 at the selected point and transmit the selected number of alternating impulses as previously described.

The shoulder 55 of the stop when projected is engaged and the stop locked by the corresponding shoulder of the retaining disk.

Vhen the key lever 20 and U-lever 50 are released after depression, the retaining disk 56 is turned by its shouldered lever 60 and its spring 63, to register the corresponding openings in the retaining disk and the selecting disk and permit the selected stop 52 to drop into its non-stop position. The stop arm 39 then again revolves until arrested by the next selected stop 52 or, when setting, by the initial bar stop 40 as described.

To depress the receiving type levers corresponding to the transmission key levers depressed, by the alternating positive and negative impulses transmitted as above described, I prefer to use, in this example of my invention, the following means, shown as a whole in Figure 1:

64 designates the receiving type levers (only one shown) of which there are in this example sixty-two. 65 designates spring pressed type lever pull levers corresponding 5to and pivotally connected to the respective type levers 64. The pull levers 6'5 are arranged to enter corresponding notches, when aligned as hereinafter described, or in this case, six, selector bars 66, and have latches 67 (as shown in detail in Figures 8 and 10) which, when the pull bars enter the aligned notches, engage a pull bar operating bar 68, which is actuated by an attached plunger 69, follower lever 70 and cam 71. The cam 71 is fixed to a spring pressed sleeve 72 (shown in Figure l0) sliding but compelled to turn with a movable clutch section 73 adapted to engage a clutch section 74 fixed toa shaft 75, and to the movable clutch section 73 is fixed a clutch shifting spiral 76, which is engaged by a spring-pressed following lever 77 (shown in detail Figure 14).' The following lever or follower 77 is engaged by a pivote-d lever 78, which is in turn engaged by a latch 79, pivoted to a bent operating bar 80, swinging on a fixed pivot 81, and pressed by a spring 82. The bent clutch operating bar 80 has an upturned end (shown in detail in Figure 13) which engages the corresponding shoulders 82 of, in this case, six selector bar positioning bars 83, which at one end enter notches 84 in. the selector bars and at the other end engage a selector wheel 85, which has sixty-two transverse combinations of keys corresponding to the sixty-two respective transmitting key levers 20. The selector Wheel 85 is revolved in unison with the transmitting commutator shaft 11 by an escapement mechanism 86, operated by a polarized relay 87 in the transmitting circuit 38, the double escapement wheel being fixed on the shaft 88 of the selector wheel.

The selector wheel shaft 88 is driven through a slip clutch 89, and gears 90 by a motor 91 (shown in Figure 1) in unison With the transmission commutator', being controlled by the escapement mechanism 86, and polarized relay 87, which is operated by the alternating impulses transmitted.

The selector wheel shaft 88 and selector wheel 85 are initially started and stopped by the setting lever in correspondence with the transmission commutator by a stop arm 92 on the shaft engaging a spring-pressed stop bar 93, which is pivotally connected toa lever '94 connected by a pivot 95 to a lever 96 swinging on a pivot 97. The lever 94 has a follower 98 engaging a spiral 99 on the shaft 88.

Themotor 91 is also connected by one of the gears 90 and a gear 100 to the shaft 101, which through bevel gears 102 is connected to the type lever cam operating shaft 75. The spiral following lever 94 is engaged by an arm of the bent lever 80.

The bent bar 80 is operated by a relay 103, shown in detail in Figure 13, in the main circuit 38, which relay is operated by a continuous positive or negative impulse.

The solenoid 104 of the relay 103, is fixed to a fixed bearing 105, on which is pivoted the bent bar 80, which carries the armature 106 of the relay.

The segmental selector bars 66, in this example, six in number, are shifted to engage or not to engage the respective positioning bars 83 by a revolving cam 108, engaging a spring-pressed pivoted cam follower 109, which is connected by springs 110 to and also engages arms 111 on the respective selector bars. The cam follower 109 and with it the selector bars are held .in normal position with the positioning or locking bars 83 by a spring ,122.

The cam 108 is revolved in unison with the selector wheel 85 through a shaft 112, and a gear 113 engaging a gear 114 on a shaft 115, which is operated from the type lever operating shaft through bevel gearing 116, a shaft 117, bevel gearing 118, a shaft 119 and gears 120 and 121.

The positioning or locking bars .83 are disengaged from the selected notches 84 in the selector bars 66, by a shouldered cam 123 engaging projections 124 on the respective positioning bars, the cam 123 being revolved in unison with the selector wheel owing to its being fixed on the shaft 115, which operates the selector bar shifting cam 108, as described.

The construction, arrangement, adjustment and operation is as follows:

)Vhen commencing to transmit, the setting lever 51 is depressed, as described, causing the transmission commutator to revolve about three revolutions, and transmit accordingly an alternation of positive and negative impulses over the main line 38 to the relay 103 and the more sensitive polarized relay 87. The setting stop 93 beinv normally withdrawn by its spring from the stop arm 92 of the selector wheel shaft 88, the shaft 88 is released and revolved about three times by the motor 91, through the operation of the sensitive relay 87, by the alternating impulses, until the spiral 99, causes the setting stop 93, to engage thestop arm 92 and stop the selector wheel 85 at the starting position corresponding to the initial position of the commutator set by the stop 40. 'In this position the selector bars 66, are not p-ositioned by the selector wheel as hereinafter described, but the bent bar is operated by the direct current relay 103, to withdraw the follower 94 from the spiral 99, and cause the withdrawal of the setting stop 9 3 by its spring from the shaft arm 92, the shaft 88 being retained in this initial position by the escapement 86.

Then when any key lever 20 depressed, it

causes the selected arc movement of the commutator and the transmission of the selected member of alternating impulses as previously 5 described.

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These alternating impulses, through the sensitive polarized relay 87 and escapement 86, cause the revolution of the selector rwheel 85 through an arc and to a transverse combination of keys thereon corresponding to the transmission key lever depressed. This partial rotation of the shaft 88 does not rotate the spiral 99 enough to reengage the stop 93 with the shaft arm 92.

The final direct current vitalizes the relay 103 which operates the bent bar 80, so as to release the positioning bars 83, as shown in Figure 15, and incident-ally the `tollower 94 from the spiral 99, as be'l'orc.

The positioning' bars 83, then respectively enter or do not enter the selected combinat-ion ofkeys on the selector wheel 85 and accordingly enter or do not enter the corresponding notches 84 in the selector bars 66. The selector bar operating cam 108 then shifts the selector bars 66, not thus locked by the positioning bars 83, with relation to those thus locked so as to align a combination of notches in the selector bars opposite the pull bar of the type lever 64 corresponding to the key lever depressed.

At the same time, the bent bar through the latch 79 and lever 78 releases the follower 77 from the spiral 76 causing the movable clutch section to engage the fixed clutch section 74 on the shaft 75, and the cani 71 to depress the selected type lever through the connections described.

After this printing action of the selected type levers, the cam 123, withdraws the positioning bars 83 from the selector bars and the cam 108 returns the selector bars 66 to their normal position, the selector Wheel being retained in its last selected position by the escapement 86.

When the next lever 20 is depressed, the

transmission commutator, and with it the.

selector wheel 85, are rotated through a further arc corresponding to the key lever depressed a-nd the number of alternating impulses transmitted, and a corresponding combination of notches in the selector bars 66,is aligned and the corresponding type lever depressed as described.

It is evident that many other means than those herein illustrated may be used for carrying my invention into effect without departing from the boundaries of my invention as defined by the following claims.

I claim as my invention:

1. A printing telegraph comprising transmitting key levers, means for transmitting a different selected number of alternating positive and negative impulses by each key lever, reception type levers corresponding to the respective key levers and means for causy ing the selected number of positive and negative impulses transmitted by each key lever, to operate the corresponding type lever.

2. A printing telegraph comprising transmitting key levers, a. commutator having a number of alternating positive and negative contacts corresponding to the respective type levers, a positive electric source connected to all the positive contacts and a negative electric source connected to all the negative contacts, a commutator brush in the transmitting circuit, a number of selector stops corresponding to the respective key levers and respectively operable thereby. and a stop arm revolving in the path of said stops with the coimnutator so that a selected number of alternating positive and negative impulses will be transmitted by the depression of each key lever. reception type levers corresponding to the respective key levers and means whereby the selected number of impulses transmitted by each key lever operates the correspondingr type lever.

A printing telegraph in accord with claim 2, comprising a setting lever in addition to the key levers, a setting stop movable into and out of the path of the stop arm revolving with the commutator, and means whereby, when the setting lever is depressed, the setting stop will be withdrawn from the stop arm and release the commutator for several revolutions and then projected into the path of the stop arm to stop the cominutator, and when any key lever is depressed to operate the corresponding selector stop, the setting stop will be withdrawn to release the commutator but will not be projected to stop the cominutator until the setting lever is depressed.

4. A printing telegraph in accordance with claim 2, in which the selector stop works comprising a commutator disk and a locking disk turning thereon, the commutator disk and locking disk having registerable guides, and the selector stops have shoulders to enlos gage the locking disk when moved by the corresponding vkey lever into the path ot the commutator stop arm, and means whereby, when the next key lever is depressed, the stop locking disk is turned on the commutator disk and the selector stop released, so as to be withdrawn from the path of the commutator stop.

5. A printing telegraph in accord with claim Q, in which the positive contacts of the con'nnutator disk radiate in one direction from a common terminal, 4and the negative contacts of the commutator disk alternate with the positive contacts and radiate in the opposite direction from a common terminal.

6. A printing telegraph in accord with claim 1, comprising a polarized relay operated by the transmitted alternating positive and negative impulses, a non-polarized relay operated by the final direct positive or negalector bar positioning bars, key lever selector bars and means whereby the selector bar positioning bars correspondingly position the key lever selector bars.

8. A printing telegraph in accord with claim l, comprising a. selector wheel having a number of combinations of keys corresponding to the respective key levers, a polarized relay in the receiving circuit, an escapement mechanism operated by the polarized relay, means whereby the selector wheel is positioned according to the selected number of impulses transmitted by the esca-pement mechanism positioning bars, means whereby the selector wheel correspondingly positions the positioning bars, type lever selector bars, and means whereby the positioning bars cor- 1jespondingly position the type lever selector ars.

9. A printing telegraph in accord with claim 1, comprising a selector wheel having a number of combinations of keys corresponding to the respective key levers, means whereby the selector wheelis positioned according to the selected number of impulses transmitted, positioning bars, means whereby the selector wheel correspondingly positions a combina-tion of positionin bars, type lever selector bars, means where y the positioning bars correspondingly position the type lever selector bars, type lever operating mechanism, and means whereby the positioning of the selector bars throws into action the type lever o eratin mechanism.

10. printmg telegraph in accord with claim 2, comprising a selector wheel having combinations of keys corresponding to the respective key levers, means whereby the selector wheel is positioned according to the positioning of the commutator by the key lever selected stop, type lever selector bars and positionin bars, means whereb the selector y wheel t rough the positioning bars correspondingly positions the type lever selector bars, a setting lever and means whereby thel setting lever causes the rotation of the commutator and a corresponding rotation of.

the selector wheel for several revolutions and then stops the commutator and selector wheel correspondingly at thel initial position.

11. A printing telegraph in accord with claim l, comprising a selector wheel having combinations of keys corresponding to the respective key levers, means whereby the selector wheel is positioned according to the number of impulses transmitted, type lever selector bar positioning bars which enter or do not enter notches in the type lever selector bars, means whereby the selector wheel correspondingly positions a combination of selector bar positioning bars, a cam operated by the selector wheel operating mechanism and means whereby the type lever selector bars are shifted by the said cam. and are thus locked or not locked and positioned to cause the operation of the selected type lever.

In testimony whereof I aiiix my signature.

YUICHI OKAMOTO. 

